HP ProLiant SL250s Gen8 User Manual page 46

Attach the mini-SAS cable to the rear SAS port on the system board.
5.
Attach the power connectors to the personality board. The power connectors can plug into either port
6.
on the personality board.
Install the GPU bracket.
7.
Using the six M2.5 screws included with the GPU cage and the four flathead screws included in this kit,
8.
attach the hard drive cages to the GPU cages:
Hardware options installation 46